I just recently upgraded my imac (2Ghz intel core 2 duo, 3 GB 667MHz DDR2 SDram) from leopard to snow leopard. Since then I've noticed some things have been running slower and i've been getting a lot of "applications not responding". I've even noticed that certain video files or flash games have been lagging. I plan on maxing out my ram to 4gb asap but I'm wondering if there is anything else i can do to speed up my computer.